Bulletin of the Russian Academy of Sciences Physics

Dynamics of Extremely Short Pulses in an Anisotropic Optical Medium with a Two-Level Impurity System Using Glauber’s Approach

Mikhail B. Belonenko, N. N. Konobeeva

Published Dec 1, 2022• 2 citations

Abstract

Abstract A study is performed of the propagation of extremely short optical pulses in a two-level impurity system with carbon nanotubes and anisotropic optical properties. A system of effective equations for the vector potential of the electromagnetic field and pseudospin is derived on the basis of Maxwell’s equations, along with kinetic equations for the average values of pseudospin operators obtained according to Glauber. The effect the system parameters (temperature and vector of polarization’s angle of inclination to the CNT axis) have on the spatial characteristics of a extremely short pulse is analyzed.

DOI: 10.3103/s106287382212005x

Related papers

Dynamics of extremely short pulses in two-level impurity systems in the framework of the glauber approach-=SUP=-1-=/SUP=-

Belonenko M.B., Konobeeva N.N.

In this work, we study the features of the propagation of extremely short optical pulses in a two-level system using the example of a deuterated ferroelectric containing carbon nanotubes. Based on the Heisenberg equation of motion for the average values of the pseudospin operators, as well as the wave equation for the electric field, a numerical simulation of the dynamics of an electromagnetic pulse is carried out. The evolution of the system for various parameters of the problem is demonstrated. Keywords: extremely short pulse, two-level system, carbon nanotubes.

Оптика и спектроскопияJan 1, 20220 citations

Динамика предельно коротких импульсов в примесных двухуровневых системах в рамках подхода Глаубера-=SUP=-1-=/SUP=-

М.Б. Белоненко, Н. Н. Конобеева

Оптика и спектроскопияJan 1, 20220 citations

Ultrashort optical pulses in two-level systems with Coulomb interaction and defects

Mikhail B. Belonenko

The dynamics of an ultrashort optical pulse in an ensemble of two-level systems (in particular, in the presence of defects) is considered in the framework of the microscopic pseudospin formalism without limitation on the pulse power in the approximation of unidirectional propagation. The effective equations for the electric field amplitude and polarization of two-level systems are derived and solved numerically. Quasi-soliton modes of propagation of ultrashort optical pulses are revealed and the dependences on the macroscopic Hamiltonian parameters are analyzed. The effect of various types of defects on the propagation of ultrashort pulses is detected.

Technical PhysicsApr 1, 20100 citations

Amplification of extremely short pulses in optical media

Alexander A. Zabolotskii

The dynamics of pulses with durations comparable to the inverse transition frequency that propagate in an optical medium is studied in terms of two integrable systems of Maxwell-Bloch equations. The first model describes the field interaction with a nondegenerate medium with a permanent dipole moment and permanent external pumping. A general formula is derived for the N -soliton solution. Particular solutions are used as examples to investigate the effect of permanent dipole moment and pumping on the soliton dynamics. The second model describes the interaction between two-component electric-field pulses and a two-level degenerate medium with permanent upper-level pumping. For different initial magnetic-sublevel populations, soliton solutions are used as examples to show that pumping causes a change in polarization dynamics. A two-soliton solution is used to analyze the interaction of solitons in a two-level medium with external pumping.

Journal of Experimental and Theoretical PhysicsMay 1, 20028 citations

Three-dimensional dissipative quasi-solitons in carbon nanotubes

N. N. Konobeeva, Mikhail B. Belonenko

The propagation of three-dimensional quasi-solitons in a system of carbon nanotubes with two-level impurities has been investigated. The system of effective equations is derived in the form of analogs of the Sine–Gordon classical equation and Bloch equations. The effects observed with a change in the inverse population and damping parameter have been studied.

Optics and SpectroscopyApr 1, 20172 citations

Spatio-temporal properties of pulse propagation in a graphene quantum system

Chao Xiao

Abstract In this paper we have theoretically studied the spatial-temporal evolution of electromagnetic light propagation through a four-level graphene quantum system by using density matrix method and perturbation theory. The four-level graphene quantum medium interacted by an elliptical polarized coupling and a weak probe lights, respectively. We present the analytical solution for solving the Maxwell–Bloch equations for graphene and electromagnetic field in space and time domains. Then, we have analyzed the dynamic control of pulse propagation and optical dual switching in such a laser-driven quantum system. Our theoretical findings show that by adjusting the optical parameters such as elliptical angle i.e. phase difference between right-and-left circularly polarized, one can easily control the absorption spectrum and pulse propagation of the probe light in graphene medium. Our results may have potential applications in designing the new quantum devices for usage in quantum information processing.

Laser PhysicsDec 31, 20210 citations